Installation of fasteners in concrete



Nov. 25, 1969 ASCH 3,479,785

INSTALLATION OF FASTENERS IN CONCRETE Filed Oct. 19, 1966 2 Sheets-Sheetl INVENTOR G 0 1 e A s c h ATTORNEY Nov. 25, 1969 G. ASCH INSTALLATIONOF FASTENERS IN CONCRETE Filed Oct. 19, 1966 Gale Asch M Uited StatesPatent 3,479,785 INSTALLATIUN 0F FASTENERS IN CONCRETE Gale Asch, Rte.2, Box 186-1, McKinney, Tex. 75069 Filed Oct. 19, 1966, Ser. No. 587,710Int. Cl. E04g 17/02; E04c /18 US. Cl. 52-701 4 Claims ABSTRACT (BE THEDISCLOSURE This invention relates to a technique for accurately spacingand aligning fasteners for securing members to concrete or the like, andmore particularly to the use of a template to attach to form work forconcrete for holding in position fasteners or inserts at accuratelyspaced and aligned locations.

When it is desired to fasten a member to a concrete beam, column orslab, it is often the practice to embed male or female fasteners orinserts in the concrete as it is placed. While such a technique providesan anchor for the member, considerable difficulty is encountered inproviding accurate spacing and alignment of the male or female fastenerinserts. These items are ordinarily individual units which must beseparately mounted on the face of the concrete form against which theconcrete is to be placed, or which are mounted by drilling holes throughthe form through which the fasteners can be held, placed or inserted, orwhich are pushed into the surface of the concrete after it is placed butwhile it is still soft and plastic. Since these operations are done inthe field, usually after the concrete form has been constructed, it isnot unusual for substantial error in the positioning of the fasteningmeans to occur, resulting in either incorrect spacing or misalignment,or both, of the fasteners when it is attempted to secure the member tothe concrete. Another method widely used for installing fasteners inconcrete is by drilling holes in the hardened concrete surface andinserting expandable threaded inserts or the like. This techniqueusually requires accurate field measurements for correct spacing andalignment of the fastening means also, and is subject to interferencefrom items embedded in the concrete such as reinforcements and the likeand from the difiiculties inherent in drilling in concrete. Either ofthese techniques results in considerable expenditure of time by skilledcraftsmen in placing the fasteners and also in securing the members dueto inaccuracies in the spacing and alignment of the fasteners onceplaced.

It is therefore a principal object of this invention to provide atechnique for installation of fasteners in concrete such that thespacing and alignment of the fasteners in the completed concretestructure will be precise whereby the parts to be secured to theconcrete may be readily aligned with the fasteners, the fasteners inaddition to being installed without relying upon precise measurement inthe field of the position of each fastener. Another object is to provideapparatus for installing fasteners in concrete precisely spaced andaligned using means adapted to shop fabrication by mass productiontechniques rather than the existing slow and inprecise field techniques.

In accordance with the invention a prefabricated template is used forholding a number of fastening devices in the desired positions in theconcrete. The template may be a generally flat elongated strip adaptedfor attaching to a concrete form. The fasteners may be internallythreaded to accommodate bolts which provide the function for holding thefasteners to the template until the concrete is set up and then thebolts are removed and can be reused for securing the member to theconcrete. The

3,479,785 Patented Nov. 25, 1969 template may be constructed with arecess at the position of each of the fasteners or it may be constructedwith a continuous recess along its entire length, so that boltheads willnot interfere with installing the template fiat against a concrete form.The apertures or positions for the fasteners may be provided in thetemplate spaced at a basic interval so that the template can be used forinstalling fasteners for any member which has provision for fastening atany spacing which is a multiple of an integer and the basic interval atwhich the apertures or positions of the template are spaced.

The novel features which are believed characteristic of this inventionare set forth in the appended claims. The invention itself, however, aswell as further objects and advantages thereof, will best be understoodby reference to the following detailed description of particularembodiments, read in conjunction with the accompanying drawings,wherein:

FIGURE 1 is av pictorial view partly in section of one embodiment of thetemplate and one of the types of associated fasteners of this invention,in place on a concrete form;

FIGURE 2 is an elevation view in section taken through one of thefasteners of FIGURE 1 after the concrete has been poured;

FIGURE 3 is an elevation view in section, corresponding to FIGURE 2, ofone of the fasteners after the form has been removed and a member boltedto the fastener;

FIGURE 4 is a pictorial view of a template and fastener arrangement inaccordance with another embodiment of the invention;

FIGURE 5 is a pictorial view partly in section of a template andfastener arrangement in accordance with another embodiment of theinvention;

FIGURE 6 is a pictorial view in section of a template and fastenerarrangement according to still another embodiment of the invention;

FIGURE 7 is a pictorial view of one of the fasteners used in theembodiment of the invention which is illustrated in FIGURE 6;

FIGURE 8 is a pictorial view partly in section of one of the templatesof FIGURE 1 used for locating bolts in concrete; and

FIGURE 9 is an elevation view in section taken along the line 99 ofFIGURE 8.

With reference to FIGURE 1, a template 10 is shown which functions tohold a number of fasteners in a fixed position in accordance with thisinvention. The template 10 in this embodiment is in the form of anelongated strip of metal or the like having a channel running the lengththereof. The channel provides the function of accommodating bolt headsof bolts used to secure to the template a plurality of concrete insertsor anchors 11. The inserts 11 are internally threaded for engagement bythreaded bolts 12 which hold the inserts in place against the insideface of template 10 while the concrete is being poured and set. Thesebolts can be subsequently used to attach the desired member to theconcrete surface. The channel shaped template 10 is temporarily securedto the surface, against which the concrete is placed, of a form 14 typeordinarily used in pouring concrete. Small nails 15 or other suitablefasteners may be used for this purpose. The template 10 would beordinarily positioned along an interior flat surface of a concrete formin the location where a member, such as a continuous structural element,for example a steel angle, is later to be applied. The inserts 11 wouldbe therefore positioned by the template in a manner such as to alignwith bolt holes in the member which is to be installed. Accordingly,holes must be provided in the bottom of the channel of the template toaccommodate bolts in the proper positions. To this end, the proper holesmay be located to fit each particular member to be installed, orpreferably positions may be provided spaced at a basic interval toprovide for attaching the inserts 11 at a wide variety of spacings byprepunching, drilling, or slugging the template, leaving a large numberof completed holes or punchouts 16 which may be removed by a centerpunch or the like at each place that an insert 11 is to be attached.

Referring now to FIGURE 2, it will be noted that the template 10, heldsecurely to the concrete form 14- by the nails 15, holds the fastener 11accurately in position while concrete 18 is being poured and set. Ifdesired, means may be provided at the ends of the channels to preventthe concrete 18 from entering the channel around the bolt heads. It isnoted that the inserts 11 are shown for illustration as truncated cones,although it will be understood that other shapes would also be suitable.

After the concrete 18 has set up, the form 14 is stripped away leavingthe template and inserts in place in the concrete structure. At thistime the ends of the nails could be flattened against the template witha hammer or removed by means of a chisel, wire cutter or the like,leaving the template in place. Alternatively, the bolts 12 could beremoved and the template together with the nails removed from theconcrete by pulling on the exposed points of the nails with pliers orthe like. With reference to FIGURE 3, the bolts 12 must be removed fromthe threaded inserts, so member 19 can be installed by inserting boltsthrough holes in the member 19 and into the threaded inserts 11 which ofcourse will be accurately spaced and aligned to match with the boltholes in this member. Although a simple angle shape is illustrated forthe member 19, it will of course be understood that the element to beinstalled on the face of the concrete may be of any type and anymaterial desired.

Instead of using bolts to hold the inserts to the template asillustrated in FIGURES 1-3, other means may be used for this purposesuch as illustrated in the embodiment of the invention shown in FIGURE4. A template 20 is used which is in the form of an elongated metalmember having a pair of channels running the length thereof. Fasteners21 for use with this template are in the form of internally threadedmembers as before with a fiat plate 22 added having four square holes 23formed therein. These holes 23 align with four upstanding segments 24which are formed in the template by cutting away portions of thechannels. The inserts 21 are held firmly in place against the template20 by means of a pair of pins 25 inserted through the loops formed bythe upstanding segments 24 which pass through the holes 23 in the baseplates 22. As before holes are provided in the template 20 toaccommodate nails or the like for securing the template to a concreteform. In this embodiment holes are provided in the template at thelocations for the fasteners to permit passage of a bolt through thetemplate to the insert. Should the fastener be drilled entirely throughits length, a paper plug or other suitable means may be used forpreventing concrete from entering the threaded hole.

As may be seen by reference to FIGURE 5, in place of using a channelrunning the length of the template, other means may be used forrecessing the bolt heads. A template in the form of an elongated metalstrip has a plurality of fasteners 31 secured thereto by bolts 32, whilethe bolt heads being recessed by a plurality of dimpled or depressedportions 33 formed in the template 30. As before, the template 30 issecured to a concrete form 34, by a plurality of nails 35 or the like.The embodiment of FIGURE 5 is similar in all respects to that of FIGURES1-3 and functions in the same way, the only difference being in thearrangement used to prevent the bolt heads of the bolt 32 frominterfering with the form 34.

In another embodiment of the invention as will be seen by reference toFIGURES 6 and 7, a bayonet or twist-lock type fastening arrangement maybe used to secure the anchors or inserts to a template 40. In thisembodiment the inserts or anchors 41 are internally threaded asillustrated above. However, these inserts have formed at the basethereof a plurality of outwardly projecting lugs 42. To accommodate thistype of insert, the template 40 has formed therein a plurality ofshallow dimpled portions 43, each of which has a hole 44 in the centerwith a plurality of radial slots 45 arranged to mate with the lugs 42.After the template 40 is secured to a form 46 by nails or the like, theinserts 41 are secured in place by inserting the lugs 42 in the slots 45and twisting the anchor 41 about its axis. The edges of the holes 44 maybe slightly bent or canted to hold the inserts 41 more securely in placeas is conventional in a fastener of this type. The template 40 may ofcourse contain many unused depressions 43 so that the template may beused for a wide variety of different bolt spacings for various membersto be bolted to the concrete.

While various arrangements have been shown for securing the fasteners tothe templates it will be of course understood that these fasteners couldbe formed integrally with the template and the same function would beprovided. However, such an arrangement would be more difficult tofabricate and would be more diflicult to adapt to a wide variety of boltspacings for members to be bolted to the concrete. Also, internallythreaded fasteners may be externally threaded at one end, with holes inthe template being internally threaded so that the fasteners may bescrewed into the template at the appropriate places. Various othertechniques for attaching the fasteners to the template will be apparent.

The template shown in FIGURE 1 may be used for anchoring bolts at spacedand aligned positions in a concrete slab or the like. With reference toFIGURES 8 and '9, a template 10 is shown attached to a cross-bar 48 on aconcrete form 49. A number of bolts 50 are positioned in holes in thetemplate spaced a preselected distance apart. Each of the bolts is heldto the template by a nut or a pair of nuts, the lower one if it is usedof course being placed on the bolt before it is inserted into thetemplate. The bolts are thus supported securely in an upright positionand so when the concrete 51 is thereafter poured and allowed to set upthe bolts heads will be firmly anchored deep in the concrete. Then thetop nuts can be removed, the forms stripped away, and the bolts will bein position for securing a member to the concrete.

When installing window or door frames in concrete structures, it isoften necessary to apply caulking material at the interface between theframe and the concrete. The templates of this invention provide animproved technique for accomplishing this in an embodiment similar tothat of FIGURE 1. The channel may be V-shaped instead of rectangularshaped, with the threaded inserts extending from the sides of thechannel at an angle with the face of the concrete. A sub-buck member, as19, which is then bolted to the inserts would have a lip extending intothe channel, and the channel could be then filled with caulkingmaterial. The window or door frame could then be attached to the member.

While the technique for anchoring fasteners for members in concreteaccording to this invention has been described with reference toparticular embodiments, it is of course understood that this descriptionis not to be construed in a limiting sense. Other embodiments of theinvention, as well as modifications of the disclosed embodiments, willbe apparent to persons skilled in the art upon reference to thisapplication. It is therefore contemplated that the appended claims willcover any such modifications or embodiments as fall within the truescope of this mvention.

What is claimed is:

1 A template for accurate spacing and aligning of fastenmg means inconcrete or the like and being adapted for bemg secured to a form whichcontains the concrete until setting thereof and releasable from saidform after setting of the concrete comprising a generally flat, rigid,elongated member having a pair of parallel channels running along thelength thereof with the channels being broken away at spaced locationsto provide sets of outwardly projecting loops, the fastening meansincluding plates having holes corresponding to the sets of loops wherebythe fastening means are secured to the templates by pins extendingthrough said loops with the plates held between the pins and the flatmember.

2. A template as defined in claim 1 wherein said locations are spacedapart at a basic interval to correspond to a spacing which is anintegral multiple of the basic interval of fastening means of a memberto be secured to the concrete.

3. A template as defined in claim 1 including aperture at each locationextending through said member.

4. A template as defined in claim 2 further including holes formed insaid member for receiving devices for fastening said template to saidform.

References Cited UNITED STATES PATENTS Girard 52-704 X Lohmann 52710Murphy et al 52 699 X Painter 249176 X Heltzel 25131 Rappas 25-131 XKahn 52710 De Wees 52701 U.S. Cl. X.R.

